OSMUNDA: Its Qualities

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 8 years ago.

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Many growers use it for all genera; it should be relatively strong in fiber quality, not decaying and soft; it has largely been replaced by bark. A74-114
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Osmunda Comments
OSMUNDA: Aerial Root Mass of Two Common Ferns Osmunda regalis and O. cinnamomea; success can be had by taking full advantage of the good nutritive qualities while lessening its water-holding capacity; becoming expensive. A73-875 0
OSMUNDA: As Potting Medium It is derived from three ferns widely distributed in the U.S. and Canada, provides nutrients needed by the plants; lasts long, aereates well, is costly to buy, hard to work with, is scarce. A86-497 0
OSMUNDA: Chemical Analysis (typical) Moisture 12%, pH 4.3; ash 5.5%, nitrogen forms 0.14%, phosphorous 0.06%, potassium 0.57%, calcium 0.4%, magnesium 0.3%, sulfur 0.16% and silica 3.0%. A65-832 0
OSMUNDA: Digging, Preparing and Using Osmunda regalis, 0. Claytonia, and 0. cinnamomea are native to northern United States and Canada; dig large plants with 20 inch circumference of soil six inches deep; wash it thoroughly in a lake or lots of water remove the hard woody core, cut the rest into smaller pieces. Ca8l(2)-35 0
OSMUNDA: Does it Need Fertilizer? Cattleyas and phalaenopsis plants grown in it get most if not all the nutrients they need, without fertilizer; do not use more than one teaspoon to five gals, water with a 20-20-20 or other formula, and use only once a month. A66-1025 0
OSMUNDA: Importation Into Great Britain This has been banned. OR87-237 0
OSMUNDA: Preparation for Use It grows in swamps; grub out the roots of the fern; dry them and remove soil and debris; sterilize with methyl bromide, to kill weed seeds, but handle with care; store in burlap bags; for use, soak it in water and cut into desired size for potting. A61-659; A61-823 0
OSMUNDA: The Ferns Of the 13 native to North America, three grow in Canada; descriptions, growing areas,etc. refer to Ca-81(3)-30; digging up, preparation fcr potting material, and use as a potting medium. Ca8l(3)-35 0
OSMUNDA: Treatment in the Pot Drench with 4% formalin to kill Fusarium spores. A86-74 0

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